package socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.charset.StandardCharsets;

/**
 * 服务端
 */
public class Server {
    private ServerSocket serverSocket;

    public Server() {
        try {
            System.out.println("正在启动服务端");
            serverSocket = new ServerSocket(8088);
            System.out.println("服务端启动成功");
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public void start() {
        try {
            while (true) {
                System.out.println("等待客户端连接...");
                Socket socket = serverSocket.accept();
                System.out.println("一个客户端连接成功" + socket.getRemoteSocketAddress());

                //启动单独的线程来处理与客户端的通信
                Runnable handler = new ClientHandler(socket);
                Thread thread = new Thread(handler);
                thread.start();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public static void main(String[] args) {
        Server server = new Server();
        server.start();
    }
    /**
     * 该线程任务用于负责与指定的客户端通信
     */
    class ClientHandler implements Runnable {
        private Socket socket;

        public ClientHandler(Socket socket) {
            this.socket = socket;
        }

        @Override
        public void run() {
            try {
                InputStream is = socket.getInputStream();
                InputStreamReader isr = new InputStreamReader(is, StandardCharsets.UTF_8);
                BufferedReader br = new BufferedReader(isr);
                String line;
                while ((line = br.readLine()) != null) {
                    System.out.println("客户端说：" + line);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                try {
                    socket.close();//进行四次挥手
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        }
    }
}
